Laserfiche WebLink
Sequoia 080 Chesapeake Drive Redwood City,CA 94063415) 364-9600 FAX(415) 364-9233 <br /> 1900 Bates Avenue,Suite L Concord,CA 94520 (510) 686-9600 FAX(510)686-9689 <br /> Analytical 819 Striker Avenue,Suite 8 Sacramento,CA 95834 (916) 921-9600 FAX(916)921-0100 <br /> RECEIVED <br /> December 21, 1994 ,)E#& DEC 2 7 144 <br /> ��V1 Gtkl-fVl1KIHt1(IV KEGIfi� <br /> UNOCAL Corporation <br /> 2000 Crow Canyon Place <br /> San Radon, CA 94583 <br /> Attention: Mr. Phillip C. Stem <br /> Regional Manager <br /> Subject Lev Level Toluene and Xylene Detection is En�zrcnmertal Samples <br /> Dear Mr. Stern: <br /> I am writing this letter in response to recent concerns expressed by your consultants, that <br /> soil, water and air samples at several monitoring sites have unexpected low levels of toluene and <br /> xylenes. Although these compounds are major components of fuel hydrocarbons, our review has <br /> shown that they have been repeatedly detected as discreet peaks in these samples, rather than as <br /> part of a fuel hydrocarbon pattern. For this reason, we do not feel that these compounds, in <br /> the samples in question indicate fuel hydrocarbon contamination. We have examined sources <br /> of these compounds in the past but have not been able to determine a definite source of <br /> contamination. For this reason, Sequoia Analytical is now conducting a detailed experiment titled <br /> "Investigation of the Migration of Aromatic Compounds through Sample Container Seals". This <br /> investigation will focus on outside sources of Toluene and Xylenes entering environmental <br /> samples. It will also attempt to eliminate sources of contamination not related to gaseous <br /> migration of contaminants. We hope to have this investigation concluded prior to the end of <br /> January, 1995. Thank you for your cooperation in the investigation and your attention to the <br /> problem. <br /> Very truly yours, <br /> SEQUOIA ANALYTICAL <br /> Belinda e <br /> C. Va <br /> Laboratory Director <br />